# Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/

# This validator is used in special situations only. In most cases CoreWorkflow is used instead.
# It does not run for any object which has ChecksCoreWorkflow concern.
# Please note that all objects that may have custom attributes created via UI use CoreWorkflow.
# This may run in Ticket::Article if custom attribute were created manually.
# Or if there are custom modifications using this functionality

class Validations::ObjectManager::AttributeValidator::Required < Validations::ObjectManager::AttributeValidator::Backend

  def validate
    return if record.class.include?(ChecksCoreWorkflow)
    return if !value.nil?
    return if optional_for_user?

    invalid_because_attribute(__('is required but missing'))
  end

  private

  def optional_for_user?
    return true if system_user?
    return true if required_for_permissions.blank?
    return false if required_for_permissions.include?('-all-')

    !user.permissions?(required_for_permissions)
  end

  def system_user?
    user_id.blank? || user_id == 1
  end

  def user_id
    @user_id ||= UserInfo.current_user_id
  end

  def user
    @user ||= User.lookup(id: user_id)
  end

  def required_for_permissions
    @required_for_permissions ||= begin
      attribute.screens[action]&.each_with_object([]) do |(permission, config), result|
        result.push(permission) if config[:required].present?
      end
    end
  end

  def action
    return :edit if record.persisted?

    attribute.screens.keys.find { |e| e.start_with?('create') }
  end
end